Tamiya 70110 4-Speed Crank-Axle Gearbox Kit
This gearbox has four possible gear ratios, including the highest gear ratio of Tamiya’s gearbox series, 5402:1. The other options are 126:1, 441:1, and 1543:1. This gearbox also features a worm gear, which locks the output shaft when the motor is not turning.
Overview
The Tamiya 4-speed crank-axle gearbox has four possible gear ratios, including the highest gear ratio of Tamiya’s gearbox series, 5402:1, as well as 126:1, 441:1, and 1543:1. This gearbox also features a worm gear, which locks the output shaft when the motor is not turning. A clutch gear prevents the gearbox from destroying itself in case the output shaft gets stuck. The kit comes with all parts necessary to build the gearbox in any of the four possible configurations.
General specifications
| Typical operating voltage: | 3 V |
|---|---|
| Gear ratio options: | 126, 441, 1543, 5402 :1 |
| Free-run motor shaft speed @ 3V: | 12300 rpm1 |
| Free-run current @ 3V: | 150 mA2 |
| Stall current @ 3V: | 2100 mA |
| Motor shaft stall torque @ 3V: | 0.5 oz·in3 |
| Color: | gray |
Notes:
- 1
- A theoretical speed of the gearbox output shaft can be computed by dividing this speed by the gear ratio.
- 2
- This is the no-load current of the motor when disconnected from the gears in the gearbox; the no-load current of the entire gearbox with the motor connected will be slightly higher and will vary depending on the gear ratio.
- 3
- A theoretical torque of the gearbox output shaft can be computed by multiplying this torque by the gear ratio.